import axios from 'axios'
import { ElNotification, ElMessageBox, ElMessage, ElLoading } from 'element-plus'
import errorCode from '@/utils/errorCode'
import { tansParams, blobValidate } from '@/utils/ligo'
import cache from '@/plugins/cache'
import { saveAs } from 'file-saver'
import useUserStore from '@/store/modules/user'
import { Engine } from "../public/engine/engine";
import { Definition } from '../public/engine/common/definition'
import qs from "qs";
import networkCache from '../public/network/networkCache'

let downloadLoadingInstance;
// 是否显示重新登录
export let isRelogin = { show: false };

const CACHE_CONFIG = {
    //  defaultExpire: 5 * 60 * 1000, // 默认缓存5分钟
    cacheWhiteList: []
}

// 生成缓存key
function generateCacheKey(config, response = false) {
    const token = Engine.profile?.token || '';

    let paramsKey = '';
    if (!response && config.data) {
        paramsKey = JSON.stringify(config.data);
    }

    if (response && config.data) {
        // reponse 的时候似乎 config.data 已经是一个字符串了，不要在stringify
        paramsKey = config.data;
    }
    return `cache_${token}:${config.method}:${config.url}:${paramsKey}`;
}

// 超时白名单,名单中url不限制是否重复提交校验
const timeOutWhiteUrl = [
    // 文件上传
    "/drama/file",
    "/drama/oss/getObject",
    "/drama/oss/url/getObject"
];

axios.defaults.headers['Content-Type'] = 'application/json;charset=utf-8'
// 创建axios实例
const service = axios.create({
    // axios中请求配置有baseURL选项，表示请求URL公共部分
    //baseURL: import.meta.env.VITE_APP_BASE_API,
    baseURL: Definition.baseUrl,
    // 超时
    // timeout: 10000
})

// request拦截器
service.interceptors.request.use(config => {

    //console.log("request form web requestV2 url", config.url);
    // 是否需要设置 token
    // debugger
    const isToken = (config.headers || {}).isToken === false
    // 是否需要防止数据重复提交
    const isRepeatSubmit = (config.headers || {}).repeatSubmit === false
    let token = Engine.profile?.token || "";
    if (token && !isToken) {
        config.headers['Token'] = token // 让每个请求携带自定义token 请根据实际情况自行修改
    }

    // 获取config.headers 中 key Content-Type 的信息
    const contentType = config.headers['Content-Type']
    if ((config.method === 'post' && contentType && contentType === 'application/x-www-form-urlencoded')) {
        config.data = qs.stringify(config.data)
    }

    // get请求映射data参数
    if ((config.method === 'get' && config.data)) {
        let url = config.url + '?' + tansParams(config.data);
        url = url.slice(0, -1);
        config.data = {};
        config.url = url;
    }
    if (!isRepeatSubmit && (config.method === 'post' || config.method === 'put')) {
        const requestObj = {
            url: config.url,
            data: typeof config.data === 'object' ? JSON.stringify(config.data) : config.data,
            time: new Date().getTime()
        }
        const requestSize = Object.keys(JSON.stringify(requestObj)).length; // 请求数据大小
        const limitSize = 5 * 1024 * 1024; // 限制存放数据5M
        if (requestSize >= limitSize) {
            console.warn(`[${config.url}]: ` + '请求数据大小超出允许的5M限制，无法进行防重复提交验证。')
            return config;
        }
        const sessionObj = cache.session.getJSON('sessionObj')
        if (sessionObj === undefined || sessionObj === null || sessionObj === '') {
            cache.session.setJSON('sessionObj', requestObj)
        } else {
            const s_url = sessionObj.url;                // 请求地址
            const s_data = sessionObj.data;              // 请求数据
            const s_time = sessionObj.time;              // 请求时间
            const interval = 1000;                       // 间隔时间(ms)，小于此时间视为重复提交
            if (s_data === requestObj.data && requestObj.time - s_time < interval && s_url === requestObj.url
                && !timeOutWhiteUrl.includes(config.url)) {
                const message = '数据正在处理，请勿重复提交';
                console.warn(`[${s_url}]: ` + message)
                return Promise.reject(new Error(message))
            } else {
                cache.session.setJSON('sessionObj', requestObj)
            }
        }
    }

    // GET请求缓存检查
    if (config.enableCache &&
        !config.headers['X-Cache-Bypass']) {
        const cacheKey = generateCacheKey(config);
        const cachedData = networkCache.get(cacheKey);
        if (cachedData) {
            console.log(`[Cache] 命中缓存 ${cachedData}`);
            config.adapter = () => {
                return new Promise((resolve, reject) => {
                    resolve({
                        ...cachedData,
                        isCached: true
                    })
                })
            }
        }
        else {
            // 如果白名单没有当前请求的URL，则添加到白名单
            if (!CACHE_CONFIG.cacheWhiteList.includes(config.url)) {
                CACHE_CONFIG.cacheWhiteList.push(config.url);
            }
        }
    }

    return config
}, error => {
    console.log(error)
    Promise.reject(error)
})

// 响应拦截器
service.interceptors.response.use(res => {
    //console.log("request response requestV2 url", res);
    // 未设置状态码则默认成功状态
    const code = res.data.code || 200;
    // 获取错误信息
    const msg = errorCode[code] || res.data.msg || errorCode['default']
    // 二进制数据则直接返回
    if (res.request.responseType === 'blob' || res.request.responseType === 'arraybuffer') {
        return res.data
    }

    if (code === 4007 || code === 4001) {
        if (!isRelogin.show) {
            isRelogin.show = true;
            ElMessageBox.confirm('登录状态已过期，您可以继续留在该页面，或者重新登录', '系统提示', { confirmButtonText: '重新登录', cancelButtonText: '取消', type: 'warning' }).then(() => {
                isRelogin.show = false;
                Engine.clear();
                location.href = '/jxcLogin?redirect=/index';     
            }).catch(() => {
                isRelogin.show = false;
            });
        }
        return Promise.reject('无效的会话，或者会话已过期，请重新登录。')
    }
    else if (code === 500) {
        console.log("我是500")
        ElMessage({ message: msg, type: 'error' })
        return Promise.resolve(res.data)
    } else if (code === 601) {
        ElMessage({ message: msg, type: 'warning' })
        return Promise.reject(new Error(msg))
    } else if (code !== 200) {
        ElNotification.error({ title: msg })
        return Promise.reject('error')
    } else {

        // 成功请求缓存处理
        // isCached 请求时缓存内容标志，缓存内容就不再进行缓存处理
        if (!res.isCached &&
            CACHE_CONFIG.cacheWhiteList.some(url => res.config.url.includes(url))) {
            const cacheKey = generateCacheKey(res.config, true);
            
            networkCache.set(
                res.config.url.split('?')[0], // 去除 res.config.url 中的参数
                cacheKey,
                res,
            );
        }


        return Promise.resolve(res.data)
    }
},
    error => {
        console.log('err' + error)
        let { message } = error;
        if (message == "Network Error") {
            message = "后端接口连接异常";
        } else if (message.includes("timeout")) {
            message = "系统接口请求超时";
        } else if (message.includes("Request failed with status code")) {
            message = "系统接口" + message.substr(message.length - 3) + "异常";
        }
        ElMessage({ message: message, type: 'error', duration: 5 * 1000 })
        return Promise.reject(error)
    }
)

// 通用下载方法
export function download(url, params, filename, config) {
    downloadLoadingInstance = ElLoading.service({ text: "正在下载数据，请稍候", background: "rgba(0, 0, 0, 0.7)", })
    return service.post(url, params, {
        transformRequest: [(params) => { return tansParams(params) }],
        headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
        responseType: 'blob',
        ...config
    }).then(async (data) => {
        const isBlob = blobValidate(data);
        if (isBlob) {
            const blob = new Blob([data])
            saveAs(blob, filename)
        } else {
            const resText = await data.text();
            const rspObj = JSON.parse(resText);
            const errMsg = errorCode[rspObj.code] || rspObj.msg || errorCode['default']
            ElMessage.error(errMsg);
        }
        downloadLoadingInstance.close();
    }).catch((r) => {
        console.error(r)
        ElMessage.error('下载文件出现错误，请联系管理员！')
        downloadLoadingInstance.close();
    })
}

export default service
